[Elecraft] RF noise on 80M with KPA500 plugged into AC outlet

[Bob Novas]

I would open up the power plug that goes into the wall socket and check its
wiring.  I suspect that plug is doing something bad with neutral and ground
- like maybe connecting them together.  Bob - W3DK

-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of John
Freed
Sent: Tuesday, October 04, 2016 11:18 PM
To: elecraft at mailman.qth.net
Subject: [Elecraft] RF noise on 80M with KPA500 plugged into AC outlet
Importance: High

Here is an interesting situation.  On 80 meters (3.980 MHZ) the background
noise goes from S7 to S9+20 when I plug the KPA500 into the AC outlet.  I
have not turned on the Amplifier, just plugged it into the AC outlet.  I
disconnect the power cord from the amplifier at the amplifier and the noise
remains.  I unplug the power cord and the background noise drops back to S7.
This only happens on 80 meters.  I have an idea the outlet may have a
grounding problem.  I will test it tomorrow.  Any ideas??

I have a ground bar that all of the radios are attached to.  Single ground
wire to an 8 ft ground rod just outside the shack. Hmmmmm!  (me scratching
my head)

72

John Freed, KX6F
ARES
Redcross DST
Flying Pigs
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